I think thread racks are great on the wall and look so pretty. However, I am not sure about practical application. I store my thread in drawers in a plastic cabinet. I separate it by fiber content and/or color/ or size. I store all polyester thread together; all rayon thread together; cotton 50 and 60 weight by color; 40 weight all together. It works quite well. I make a point of putting thread from a project away before I work on another one. If there are time spans before working on a project, I store the thread I am using with that project for fear I might use it up and not be able to find more.